PART 5Monitoring – additional provisions
Sampling at treatment works13
1
Subject to F3paragraph (6), in each year every water undertaker or F1wholesale licensee must take or cause to be taken, from the point at which water leaves each treatment works which it uses to supply water to water supply zones, the standard number of samples for analysis—
a
for determining the concentration of residual disinfectant,
b
for determining whether, in relation to the colony counts and turbidity parameters (items 5 and 13 in Schedule 2), water leaving treatment works meets the specifications for those parameters set out in Schedule 2, and
c
for testing for compliance with the prescribed concentrations or values in respect of the coliform bacteria, E. coli, and nitrite parameters (in Part II of Table A in Schedule 1 and item 19 in Table B of Schedule 1 respectively) for leaving water treatment works.
F52
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F53
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F54
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5
Samples required to be taken by this regulation must be taken at regular intervals.
6
Where a particular treatment works is in use for part only of a year, the minimum number of samples to be taken from that works in that year must bear to the standard number or, as the case may be, F4the number specified in a current notice given by the Secretary of State under regulation 9 which departs from the standard number, the same proportion as the number of days in that year in which the treatment works has been in use bears to 365.
F27
In this regulation, “the standard number” has the same meaning as in regulation 9